Implement EPICS-backed Polynomial ID Device for I06

[Relm-Arrowny]

Fixes #2003

• Introduced I06EpicsPolynomialDevice to construct EnergyMotorLookup tables dynamically from EPICS PVs.
• Added an optional inverse EnergyMotorConverter to Apple2Controller for bidirectional gap/energy calculations.
• Renamed EnergyMotorConverter parameters from energy to value to better support generic bidirectional conversions (e.g., Motor ↔ Energy).

Instructions to reviewer on how to test:

1. Do thing x
2. Confirm thing y happens

Checks for reviewer

• Would the PR title make sense to a scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[oliwenmandiamond]

This looks good. Just think the variable name needs to be changed + need to add the config

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.13%. Comparing base (dfd1705) to head (5d4e583).

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #2016    +/-   ##
========================================
  Coverage   99.12%   99.13%            
========================================
  Files         331      333     +2     
  Lines       12913    13021   +108     
========================================
+ Hits        12800    12908   +108     
  Misses        113      113            

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[oliwenmandiamond]

Thanks, is a good first start but I think the design needs a bit more work. Please see my comments

[oliwenmandiamond]

Thanks, I think this looks much better. Couple comments to help refine it and some questions I have

[oliwenmandiamond]

LGTM, thanks!